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Given the availability of precipitation data there were three divisions that were examined <br />Districts 26 (Saguache Creek), 20 (Rio Grande main branch) and 35 (Sangre de <br />Cristo /Ute Creeks). These Divisions are geographically diverse with respect to the basin <br />with the western, northern and eastern parts of the basin represented. <br />The key `inflow' areas for storm systems to positively impact the basin with <br />precipitation are quite varied given the roughly `semi - circular' nature of the basin, with <br />the San Luis Valley being the center of the basin. In essence the passage of general <br />storms that create long periods of orographic upslope winds from the south west to <br />northeast can produce significant snowfalls. Monsoon moisture surges from the south can <br />have similar impacts by producing multiple days of thunderstorm rainfall during the <br />summer. Figure 3 shows the topography of the basin. <br />Figure 3. Map of Water Division 3 (Rio Grande River) and subsequent division boundaries. <br />